Engraving-machine.



No. 841,656. PATENTED JAN; 22,1901; W. ARMSTRONG. ENGRAVING MACHINE.

APPLICATION FILED SEPT. S, 1904.

4 SHEETSSHEET 1.

HHH H H- J nae/b3 017- rm: NORRIS PETERS c0, wasnmamu, n. c.

IND. 841,656. PATENTED JAN. 22, 1907.

W. ARMSTRONG. ENGRAVING MACHINE.

APPLICATION FILED SEPT. 3. 1904.

4 SHEETS-SHEET 2.

THE NORRIS PETERS 5a., WASHINGTON, u. c.

PATBNTED JAN. 22, 1907..

W. ARMsTRONG. I ENGRAVING MACHINE.

APPLIUATION FILED SEPT. 3. 1904.

4 SHEETS-SHBBT a.

Evy/"m7"; Was/Va ll I ll ll 1Il ILIII No. 841,656. PATENT'ED JAN. 22,190v.v

w. ARMSTRONG. ENGR'AVING MACHINE. APPLICATION, FILED SEPT. 3. 1964 c0.,WASHINGTON. n. c,

mvrrnn "erm ne WALTER ARMSTRONG, OF GHICOPEE, MASSACHUSETTS.

ENGRAVING-IVIACHINE.

Specification of Letters Patent.

Patented Jan. 22, 1907.

Application filed September 3, 1904. Serial No. 223,219.

To all whom, idly/(6 2] concern.-

Be it known that I, WALTER ARMSTRONG, a citizen of the United States,residing at Chicopee, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in Engraving-Machines, of which the following is a speci fication.

This invention relates to engraving-machines, the cbject of theinvention being to provide a machine of this character whereby a die maybe cut from which letters or symbols for type-writing machines may beformed, the face of which letters shall be curved in the direction oftheir length or height to conform to the curved surface of theplaten-roll of the type-writing machine. The die having been out, thetype are produced therefrom by rolling relatively soft metal and the cutsurface of the hardened die back and forth under-pressure against oneanother, and it has been found in practice that to produce a letter inthis manner having sharply-defined edges and corners it is necessary togive to the die a curvature whose radius is substantially equal to'theradius on which the die and type have their rocking motion, as otherwisethe type-metal will not fill all the corners of the depressions cut inthe die.

A further object of this invention is, therefore, to provide meanswhereby the cuttingtool may operate in the direction of the height ofthe letter on a radius equal to that of the platen-roll and which mayoperate in a transverse direction to this on a radius which will givethe desired curvature to the die or letter transversely of the latter.Provision may be made in the machine to vary this last-named radius; butthe swing of the tool lengthwise of the letter is on a radius which isconstant.

A still further object of the invention is to provide means in thismachine whereby the die-block may be secured to permit the cuttingtherein of either upper or lower case letters in such a manner as toinsure absolute accuracy of spacing between them vertically, to the endthat the alinement of the writing produced by types made from these diesmay be perfect.

In adjusting this machine to produce letters of various dimensions, therelation of the lengthwise and transverse radii one to the other doesnot change.

In its general principles the machine forming the subject of thisapplication is of that type described in the patent to Benton, December22, 1885, No. 332,990.

In the drawings forming part of this application, Figure 1 is a frontelevation of a machine embodying the invention. Fig. 2 is a top planView of the machine, considerably enlarged. Fig. 3 is a sectionalelevation on line 3 3, Fig. 2, and on the same scale as that figure.Fig. 4 is a sectional elevation on line 4 4, Fig.2. Fig. 5 is asectional plan view of a part of the machine, taken on line 5 5, Fig. 3.Fig. 6 is a perspective view of the dieblock holder, showing the mannerof adjusting the die for cutting upper or lower case letters. Fig. 7 isa transverse section of the die-block on line 7 7, Fig. 4. Fig. 8 is aperspective view of a portion of the patternplate.

Referring to the drawings, a a are two standards whose upper ends areunited by a rectangular frame b and the lower ends by a plate 0, whichis the pattern-plate and a portion of which is shown in Fig. 8'. Betweenthe upper ends of the standards a and adjustably secured thereto are thetwo legs e e,

which extend up through the opening in frame I) and are united by across-headf. To secure the legs 6 to the standards, the latter areslotted vertically, and screws 9 extend through the slots into the legs.

As shown in Figs. 2, 3, and 4, there are two rectangular frames 7L and11 located Within the frame I) and inside of the legs 6 e. The outerframe it is supported in the frame I) by two pivot-pins or screws j,(see Figs. 2 and 4,) and the frame 4 is supported in the frame h byscrews on pins 7c,rectangularly-arranged relative to the pins 7', thewhole constituting a gimbal-frame construction, from the framed of whichfour rods m depend, one from each corner, the lower ends of which areunited by a square plate n, from the center of which the stylus 0extends downwardly to the patternplate 0. The stylus is provided at itslower end with a telescoping point q, a spring 1" serving to press thepoint against the plate 0 to hold said point in the groove of thepattern, (in this case a letter A,) as shown in Fig. 8-.

The cross-head f has an opening 8, preferably rectangular, through itcentrally thereof, and the shank t of a work-holder carrier'or yoke 1)extends into this opening from beneath the head f and is pivotallysupported therein on pins w, which are parallel with the pins 7', asshown in Figs. 2 and 4. Between the arms of this yoke the die-holdingblock is supported on pivots y, located at right angles to the pins Thisblock is shown in perspective in Fig. 6 and in section in Fig. 7 andconsists of a rectangular box open at the bottom, in which is located asolid block 3, in which in turn is placed the die-block 4, the latterbeing secured in said block 4 by a set: screw 5, the head of which issunk beneath the'surface of the block.

When the die-block 4 is located in the block 3, the lengthwise dimensionof the letters to be cut thereon will be. at right angles to thepivot-pins y, and the block 3 in the direction From the precedingdescription it is seen of the length of these letters does not fill thespace within the block 90, and a plate 6, as shown in Figs. 4 and 5, isintroduced between the block 4 and the interior wall of the block as.This plate represents the spacing re quired between the upper andlowercase letters to be cut on the die-block, and by shifting this platefrom one side to the other of the block 3 the die-block may be correctlypositioned relative to the cutting-tool. The block 3 and the plate 6 aresecured in the block as by means of a set-screw 8. (Shown clearly inFigs. 4 and 7.)

that the rods supporting the stylus may be swung in any direction andthat the yoke i) may swing in one plane only. The connection between therods m and the yoke '12 is made through the block :0, and movement ofthe latter (and consequently of the die) is effected at the same time ina lane at right angles to that in which the yolfe swings, and to providefor these movements the block 00 is connected with the stylus-supportingrods m as follows: An outer frame 9 is provided with down-hangingsleeves 10 at each corner, through which the rods m pass, and inside ofthis frame 9 is another frame 12, supported in the frame 9 on pivots 13,parallel with pins y. Inside of the frame 12 is a third frame 14,supported on pivots 15, rectangularly disposed relative to the pivots13, and other pivots parallel with the pivots 13 extend through theframe 14 into the sides of the block 00, the disposition of these framesand their pivotal supports being clearly shown in Figs. 3 and 4. Thusthe frames 9, 12, and 14 constitute a gimbal-frame connection betweenthe block as and the rods m, said frame connection being suspended fromthe block w by the pivots 15. Therefore if the screws 9 be loosened, thelegs e may be adjusted vertically, carrying with them the yoke 12 andblock at, supported therein, together with the gimbal-' frame connectionbetween the block 00 and the rods m. Hence when the stylus is swung inthe direction of the length of the letter to be cut the yoke 12 willremain stationary and the block a; will swing on its pivots, and whenthe stylus is swinging in a direction transversely of the letter to becut the yoke '11 will swing onits pivots w and the block 00 will berigid.

The die-block when in proper position is held in the block a: ininverted position over the point of a tool 20, carried at the end of asuitable spindle 21, rotatably supported in a small lathe-head 22 on oneof the legs 6, which are secured adjustablyon the standards a, thespindle having a pulley 21 mounted thereon. The particular constructionemployed to adjust the tool and to easily remove the head 22 (tofacilitate the removal of the die-block from the block 90) isillustrated in Figs. 3 and 5. This construction is considered entirelysatisfactory; but another may, if desired, be substituted therefor. Inthe construction shown a block 23 is secured by screws 24 to the leg e.A sec ond block 25 is mounted on the first to slide lengthwise thereof,it being adjusted by means of a screw 26, mounted in a suitable bearingand engaging said sliding block. In the face of the latter is alongitudinally-disposed T-slot 27, in which the head of a bolt 28enters, the shank of the bolt extending into the back of the head 22, asshown in said Figs. 3 and 5, and being there engaged by avertically-disposed rod 29, provided with a camshaped'extremity 30,operatively connected with the shank of the bolt 28, whereby therotation of the rod may clamp the head 22 at any desired point in saidT-slot. Preferably the block 23 and the block 25 are provided withprojections 31 and 32, located behind the screw-rod and having a spiralspring 33 interposed between them, whereby the adjustment of the block25 upward will take place against the resistance of said spring.

In the block 25 is a pin 35, which extends into the path of movement ofthe head 22 whereby if it becomes necessary to remove the head for anyreason while a block is being cut it may be replaced in the sameposition relatively to the work that it previously occupied withoutdisturbing the adjustment of the screw.

The pattern-plate c has cut therein the letter or other symbol it isdesired to reproduce on a reduced scale. The cut or groove forming theletter is V-shaped in cross-section, as shown in Fig. 8, the point ofthe stylus following the bottom of the V. The tapered point of thecutting-tool 20 produces the requisite flare of the sides of thereproduced letter or symbol in the die-block.

To adjust the machine to vary the dimension of the letter in thedie-block relative to the pattern-letter, the screws g are loosened andthe legs 6 e raised or lowered, thus locating the die nearer to orfarther away from the pattern-plate, all of the parts supported on thecross-head f sliding up or down on the rods m.

It will be noted that the central portion of IIO the cross-head fextends downwardly on each side of the yoke and has the holes w therein.These are provided should it be desired to change the radius on whichthe yoke 15 may swing in a direction transverse to the length of theletter to be cut, the

change being effected by dropping the yoke and shifting the pins to toone of the holes to. This of course necessitates the like shifting ofthe tool-carrying head. If the yoke 11 were rigidly secured in theframe, the machine would still be operative to out a letter which wouldbe curved inthe direction of its length, and while for general use theefficiency of the machine would be impaired for certain work it would bequite as eflicient as though the yoke 1) were free to swing, asdescribed, in a plane at right angles to the plane of oscillation of thedie-holding block 9:.

Having thus described my invention, what 1 claim, and desire to secureby Letters Patent, is

1. In an engraving-machine, a suitable frame, a pattern, a stylusarranged in operative relation to the pattern and supported to have itstip swing in a horizontal plane, a cutting-tool, a work-holder carrierhaving a pivotal support, a work-holder having a pivotal connection withsaid carrier at right angles to the axis of said pivotal support, an

&

operative connection between the workholder and the stylus, and meansfor lengthpattern, a stylus operatively arranged to the pattern andhaving a gimbal-joint support, a cutting-tool, a work-holder carrierhaving a vertically-adjustable pivotal support, a work-holder havingpivotal connections with said carrier at right angles to the aXis ofsaid pivotal support, and a gimbal-joint connection between the stylusand the Work-holder below said pivotal connections.

3. In an engraving-machine, a suitable frame, a pattern, astylus-carrying frame having a gimbal-joint support, averticallyadjustable work-holder carrier supported to swing in oneplane, a rotary cutting-tool having a supportcorrespondingly adjustableto that of the work-holder carrier, a workholder having a pivotalmounting on the carrier at right angles to the axis of said swingingmovement, and a gimbal-joint connection between the work-holder, and thestylus-carrying frame.

WALTER ARMSTRONG. Witnesses:

WM. H. OHAPIN, M. L. DONOVAN.

